We are about a month out from our Italy trip so I'd like to finalize what all we are using tour guides for vs. just booking tickets and winging it. I've heard good things on this board about Rick Steve's audio guides for the Vatican for example. I'm just curious if you can find similar audio guides for most major attractions, or if it is worth it to book tour guides. We'll be visiting Milan, Venice, Florence, Rome, and the Amalfi Coast over the course of two weeks and are open to sites in between each (e.g., Assisi, Naples/Pompeii, Capri, etc.). I recognize that a trip like this is a once in a lifetime type event so I don't want to pinch pennies, but $50-150 tours do start to add up. Thus, I'd probably like to do a mix of self-serve and guided if possible. Any and all input is much appreciated.